The invention provides a 
vehicle control system of a plug-in gas-electric 
hybrid power 
bus and a control method of the 
vehicle control system. The 
vehicle control system comprises a vehicle controller, an engine, a controller of the engine, a 
clutch, a driving motor, a controller of the driving motor, an auxiliary motor, a controller of the auxiliary motor, a gearbox, a controller of the gearbox, a high-
voltage battery, a 
management system of the high-
voltage battery, a high-
voltage block terminal, a high-pressure 
steering system, a high-pressure gas pump system, a high-pressure air conditioner, a 
direct current / 
direct current converter, an instrument controller, a 
starter, a motor water pump, a 
high voltage control 
relay and a charging port. The engine is a 
gas engine. The auxiliary motor is arranged in front of the engine and connected with the engine through a belt. The driving motor is arranged between the engine and the gearbox. A gearbox system is additionally installed behind the driving motor, and a main speed 
reducer and a vehicle wheel are connected behind the gearbox system. According to the vehicle 
control system with the vehicle controller as the core, information of a full vehicle and all assemblies is synthesized, on the basis of vehicle and power 
assembly system 
modes, the control method is switched and coordinated, the advantages of all subsystems of the plug-in gas-electric 
hybrid power 
bus can be fully achieved, and optimal vehicle performance is achieved.